手指关节
先理解核心含义，再看它在真实句子里的用法。
手指关节
a joint in a finger, especially one of the knuckles
He injured a finger joint while playing basketball.
他打篮球时伤了一个手指关节。
手指关节
a joint in a finger, especially one of the knuckles
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Dictionary facts from AI_SUPPLEMENT.